Infection Health Self Tests We have developed a range of health condition self tests that will help you to quickly and easily perform health check tests for: Tick Bite Borrelia Syphilis Strep Throat Allergies Stomach Ulcers Inflammation and Infection Check4® Tick Bite Borrelia Check4® Syphilis Check4® Strep Throat Check4® Stomach Ulcers Check4® Inflammation and Infection